The man accused of faking sign interpretation while standing alongside world leaders at Nelson Mandela's memorial service says he hallucinated that angels were entering the stadium and suffers from schizophrenia.

Advocates for the deaf say the sign-language interpreter who spent hours on stage at Nelson Mandela's memorial service was a faker who was just waving his arms around meaninglessly. South African officials say they're investigating.

Amazon.com is already cracking same-day delivery. Next up: getting your package delivered quicker than a pizza? The online retailer is working on a way to get customers their goods in 30 minutes or less _ by drone.